“My story begins with me sitting on a bed, looking out of the window. I know that doesn’t sound like much. But let me tell you where the bed is, and what I can see from it. This bed is right in the corner of a room only just big enough for it, and the bed is only just big enough for a kid my age. (Twelve – just about to be thirteen – and skinny.) The window is the size of the whole wall, made of special tinted glass that means the room stays the same temperature all the time. The room is locked shut and you need an…